high definition
Americannoun
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a system for screen display of images that are sharper and more detailed than normal, having many more than the standard number of scanning lines per frame: HD
Most TV shows are available in high definition.
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an audio system that reproduces sound with a high degree of accuracy and clarity: HD
music recordings that use high definition.
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an optical system that produces very sharp images. HD
Other Word Forms
Etymology
Origin of high definition
First recorded in 1980–85
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The legal papers include a snapshot of the box for a high definition television.
From Barron's • May 11, 2026
Tidied into high definition, they often appear restless.
From Los Angeles Times • Sep. 3, 2025
He said the restaurant had installed high definition cameras "to boost security".
From BBC • Jul. 31, 2025
GlowTrack is robust, time-efficient, and high definition -- capable of tracking a single digit on a mouse's paw or hundreds of landmarks on a human hand.
From Science Daily • Sep. 27, 2023
The colors of the Roman afternoon suddenly seemed sharper, as if the world had switched to high definition.
From "The Mark of Athena" by Rick Riordan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
